Pump-head.



A. C. TERKELSON.

\ PUMP HE AD. APPLICATION FILED APR.21. 1914. 1

Pdtented Nov. 9,

4 SHEETS-SHEET 2.

W/T/VESSEI G75 A. C. TERKELSON.

PUMP HEAD.

APPLICATION FILED APR-21, 1914.

1,159,620. Patented Nov. 9,1915.

4 SHEETS-SHEET a;

A. C. TEBKELSON.

PUMP HEAD. APPLICATION FILED APR-21, 1914.

1,159,620, Patented Nov. 9, 1915.

4 SHEETSSHEET 4- 9 H II H II 1792/4 as, WWI 5,955, Wyn/wk,

COLUMBIA PLANOGRAPH COHWASHINUHRL D. c.

Annmarie; mnnknnson; F omzmimoy CALIFORNIA! -PUMP-HEAD..

Speci'fieation of Letters Patent. i; I

To all whom'z't'mayconccrne Beit linow-n that *IJALBERT *O; TijRKnLsoN;

a citizen of the United States; 'residing' at- Oakland; in the-county of- Alameda'an d" 5 State of California, have invented newand' useful Improvements} in Pilmp 'Heads; of whichthe following is a sp BCifi6It1OIIJ I This invention relates to power transmission- -mechanismg" and particularly to pump headss It is an obj'ect' of the-present invention to provide an improved pump head wh'erebjr double piston deep, well pnmps may be 'op-,

erated to produce more-uniform rate of l5 discharge I and avo1d the fluctuations: pro? dnced by plain"-crank drivenpistons."

A furtherobject of the inventi'bnis to pro vide a power "headof'greafly simplified con-- struction; which is of few parts, most =of' 2o which are diiph'cate and interchangeable,

and are common stock I pieces and "therefore; by eliminating specialdeslgn reducing int-- tialcostz I I The head is provlded particularly-for op- 'eratingsthe pistons of the'pump withslo'w; uniformwate' of speed-hpward' andfa'st speed downward, and to ymove"them' upward in coincidence as the cranks approach their limits of throw'vertieally, so that instead of the pistons constantly 'movinginppposite' direction and resulting in suddenlythrow ing theloadifrom one to theother'alternately'as one starts -up',in-this inventionythe pistons w1ll*be' brought into coincident ES-qnovement upwarchas one approaches its lowermost position and the "other its "uppermost.

It is an important object-of this invention; to provide apump head whichiis so designed --as totransla te rotary motion ntoreclprocat ingmotion with a predetermined character istic, and to utilizein doing this the-most economical anclieliable means. i

The inventitinconsist's ofthe parts and the" *constrnction and combination of *parts as hilly described and" claimed; having reference to the accompany? hereinafter more ing drawings, in'whioh V Figure 1 1s a front elevation of the appa- --ratus-.- liig.*2" is aCentraI, vertical fsectionthereof. Fig. 8 is a horizontal sect-ion "on theplane of the cam-shaft? Fig fis aplaQ-m vie-w partly "in" section*-in 'the plane" of thei lever pivot Fig; 5 a *diagrannnaticsview" Sci-"showing the orbit of the crank when cam:

Patented N W; 9*, 1915;

biliing :the -crank motion with 3 thevertical shift-ingac'tion '6,-"'7, Sand 9 illustrate diagrammatically the positions "o'f the cranks at four successive movements of'the cam."

Figk 10"is "a comparative time and stroke chartfshow'ingthe normal cranlrstrokeo-f a piston in af dotted {curve the strokeas prodnced by the "combinatiom iniull "line;

Fi'gai '11 sh'ows a complete pump as provided' with novel head; FigrlQ fis 'a"fr'ont eleva-" tion' oftlie headi conn ection."

2 shows" "a well casing" with afdischarge' p1pe*3,'"and't 4 are 'p1ston"rods "moving p1s= tons in the well. I I

Rod fl "is: connected "to 'a CI'OSSfh'BZLCllfi having "pit'man7 connected to 'a' crank 8 of emirshaft" 9 ;3whi1e' rod 5 is connected to cross head 10 having" double pitmenll connected to axially alined cranks/12f turnable with crankfshaft '9, ancl-atf180 frC-m-crankS.

The invention in this 'case 'consists' of .pro

vidirig means for reciprocating; oscillating or otherwise moving "the, crank shaffi andits connections seas to impartto the piston rods-- and their "pistonsa n otibnindependent of 7' and-coincident with the strokes derived from" the I'O'tati'onpf the cranks on their own axis:-

To that" end, .mynnventionrin one em bodiment is shown as including *aq'onrnal or r- V -s5= suspended at its :upper end by 'a pivot' 14c "of a short arm 'of angangnlar 1ever';15.. This 1 lever-is pivoted at 16 npon a suitzibleheadg. framed? inwhich is"m'ounted ash'aft 18 support 13 for 5 the crank *shaft 9; which is drliven'by'a 'suitabl'source"oFpower:

Itwillihgseen that oscillating the lever 15 Wvill canse' it'to" movwth crank shaft hanger isms vertiealiplane. r Thi's'oscil' lating the lever is accomplished through means ofengagement bfv'afrollerl9 on the lever, engag ng an lnternal"caniflOfsecured upon the 'cam shaft lsf I H For the "purpose: of rotatin'ggthe crank shaffi9 there?isjseenred"'upon it gears-f21 whiehimesh withpinions 22, 0th ratiol to loo 2 with gears 21?, secured-on thecam shaft 18;"

Thei gearsfand t pi nions are held inconstant and proper mesh; chirin'g th'e '.os cillat ion of 5 the crank sha'ft by "recipro'eating, actuator 13, through" means of radii s i 23"con-" neeting sa'id crankshaft 'and"thefeam shaft so that "the gears "have apla'netary inove;

mentfasito their sun .pinions when the cam? 1 shaft flop erate's' "and through it the 'crank shaft-'fisievolvedj" Hence is its antennaeembodimenu the invention includes a rotary crank-shaft for reciprocating pump pistons, and means for shifting the crankshaft laterally simultaneously with its rotation.

The shifting means for the crank-shaft is so designed and disposed that it will operate to lift the crank-shaft at such a moment as the cranks 812 are passing the normal dead centers, and thus operate to lift the latter coincidentally as they pass the dead center and would ordinarily be moving in opposite directions prior to and after passing the dead center.

My invention eliminates the usual dead stop and constant reverse travel of the pistons, and results in so moving the pistons that as one approaches the lower limit of stroke, and while the other piston is near the end of up stroke, both wi l be lifted independently of crank-motion, and one will be gradually relieved of its load by the other starting its upward stroke with crankaction and cam action.

By providing a earn as the medium for controlling the shift of the crank-shaft the rate of speed and relative time of coaction with the crank motion may be readily and precisely determined.

The cam shown in Figs. 6 to 9 is designed to produce a piston stroke, when combined with the crank stroke, clearly shown in Fig. 10 in dark full lines. With the cranks set at 180, and the cam and its connections with the crank-shaft set as shown; when the lower crank passes dead center it will be moved up a uniform rate of speed for 180 as shown by straight line A; meanwhile, the other piston will move from high dead center slightly up, as shown at B simultaneously with stroke A; thereafter the down stroke commences and is accelerated over the rate of the up stroke A. Toward the end of down stroke from B, the cam acts to commence a reverse and up stroke at C before the piston on stroke A is at the high dead center of the usual crank action. As the cranks pass dead center they are being lifted by the cam at uniform speed at D-D just past the 180 line on the diagram.

Thus I provide a means for moving a piston on its up-stroke at a desired or arbitrary rate of speed, varied from a crankmotion stroke. Practically the up-stroke of a piston carrying the load should be slower than the down-stroke of an unloaded piston, and this is had by designing the cam to act through the lever and hanger to control. the shift of the crank-shaft.

Since the cranks are at 180 relatively, the decrement of speed on the up-stroke of one is simultaneous with the increment of speed of downstroke of the other. This is clearly shown in Figs. 7 to 9, in which the full lines indicate the starting positions respectively, and the dash lines the finish positions of the cranks for each one-eighth turn of the crank-shaft. The cam makes two revolutions to one of the crank-shaft, so that as each crank approaches the high dead center it is lifted from its position at dot, Fig. 9 to position small dotted circle. The lifting function of the cam is performed at the time the cranks approach and pass dead center, and the lowering function is performed during the remaining one-half cycle, or less, of the crank-shaft, and at which time the pistons are on their strokes.

It is understood that the invention involves the provision of means whereby the crank-shaft driving a pump may be so actuated in conjunction with its rotation that the rate of speed and stroke of the pump pistons may be varied from the usual and common crank stroke speed and motion. Therefore, while I have shown a earn as the controlling and actuating medium for so moving the shaft, I may utilize other means for accomplishing this function, and the medium may be variously designed, proportioned, related and timed may be required.

In Fig. 11, to the cranks S and 12 are con.- nected cables 25 and 26, one of which is connected to a piston 27, and the other to lower piston 28 by a rod 29 passing through the upper piston. The pistons are connected together by a flexible means shown as a chain 30 which passes around a guide pulley 31. By means of the connection 30 either piston when lifted by its pitman or cable and crank will pull the other piston downward. keeping its cable taut. To permit the syn chronous upward movement of the pistons without breaking the reversing connection 30 the pulley 31 is hung in a bearing which is vertically movable, and connected to it is a draft or compensating cable which passes over a guide sheave 34: on stationary bearings of the well tube. The drag and release cable extends up to the head and is connected to an arm of lever 15, so that when the lever lifts the crank hanger 13 the cable 33 is released or lengthened and passing over a guide roller 36 on crank shaft 9 and around pulley 34. permits the sheave 31 to rise with the unidirectionally moving pistons. Conversely, when the crank-shaft hanger is lowered by the lever 15, the drag cable is shortened, and thepulley bearing 82 retracted to lower position.

The compensating connection 33 is preferably of length approximately equal to twice the depth of the bearing pulley 34- in the well, thus permitting the removal of the pump pistons and their connections, and leaving the drag cable still rove in its lower guide 34.

Having thus described my invention, what I claim and desire to secure by Letters Patent is: v

1. A power transmitting mechanism for deep-well, double-piston pumps, including in combination with the pump pistons, a crankshaft for reciprocating said pistons, and means for laterally shifting the shaft synchronously with its rotation.

2. A power transmitting mechanism for deep-well, double-piston pumps, including in combination with the pump pistons, a crank-shaft for reciprocating said pistons, and means for laterally shifting the shaft synchronously with its rotation, whereby the pause of the pistons as their cranks pass dead center is eliminated, and the pistons are moved unidirectionally, said means including a floating bearing for the crank shaft.

3. The combination in a pump with double pistons, of means for reciprocating the pistons in opposite direction during the major part of their cycles and during a portion thereof unidirectionally, including a laterally shiftable crank shaft with opposed cranks, movable in similar, irregular curved orbits.

l. Thecombination in a power head of ciprocated, and a support in which the.

crank-shaft is turnably journaled, whereby it may be shifted laterally, so that the rotary motion of the cranks about the axis of the crank-shaft is combined with a lateral shifting motion of the crank-shaft.

G. The combination with the pistons of a pump, of a power head for translating rotary motion into rectilinear motion, of a crank-shaft with oppositely disposed cranks to which are connected the pistons to be reciprocated, a support in which the crank shaft is turnably journaled whereby it may be shifted laterally, so that the rotary motion of the cranks about the axis of the crank-shaft is combined with a lateral shifting motion of the crank-shaft, and means for laterally shifting the support for the to operate the other in an opposite direction of motion, a crank-shaft and connections between the cranks of the shaft and said pistons for moving the pistons in opposite di-' rection, and means for shifting the shaft to move the pistons in unidirection during, a portion of their cycles.

8. The combination with a pump, having pistons, means connecting said pistons so that during their operation one piston acts to operate the other in an opposite direc- -tion of motion, a crank-shaft and connec:

tions between the cranks of the shaft and said pistons for moving the pistons in op posite direction, means for shifting the shaft to move the pistons in unidirection during the operation of their cycles, and a compensaid means for relaxing and retracting the said connecting means of the pistons.

9. The combination with a crank-shaft, of a pump ha ing pistons and means for moving the crank-shaft from one position to an other parallel to the first during the rotation of the shaft, said pistons operated by the cranks of the shaft so that they will reciprocate unidirectionally for a period of their cycles,

10. In a deep well pump, shafting with cranks at approximately 180 apart, the pump pistons. connections between the pistons and the cranks, and means for laterally shifting the shafting during rotation so that the cranks, will at each revolution of the shafting, have a simultaneous unidirectional movement, whereby a continuity of flow from the pump will be produced.

11. A power transmitting mechanism for 7 pumps, composing in combination with the pump piston, a rotary drive shaft with a sun gear, and an oscillating device including a planetary gear meshing with the sun gear, said device connected toand operating the piston, and means for oscillating the device about theaxis of the shaft.

In testimony whereof I have hereunto set my hand in the presenuce of two subscribing witnesses.

ALBERT C. TERKELSON.

Witnesses IRVINE SINNETT,

W. W. I-IALEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. i 

